Summer on the Lakes, in 1843
“Even such a familiarity, worthy of Jonathan, our national hero, in a prince's palace, or "stumping" as he boasts to have done, "up the Vatican stairs, into the Pope's presence, in my old boots," I felt here”
Fuller, Margaret. Summer on the Lakes, in 1843. Boston: Little, Brown & Co., 1844.
Inferred Fuller's 'Jonathan, our national hero' refers to 'Brother Jonathan', the standard early 19th-c. American national character type (the precursor of Uncle Sam), embodying brash, unmannerly Yankee self-confidence.